©2018 Hestan Commercial
7
HUCO Series
Gas Pressure Regulator
All commercial cooking equipment must have a pressure regulator on the incoming service line for safe and efficient
operation, since service pressure may fluctuate with local demand. The pressure regulator is included with the oven.
Failure to install the pressure regulator will void the equipment warranty!
The regulators supplied with Hestan Upright Convection Ovens have ¾” inlet /outlet ports and are adjusted at the
factory for 5” WC (Natural gas) or 10” WC (Propane gas) depending on customer’s ordering instructions.
1)
Prior to connecting the regulator, check the incoming line pressure, as these regulators can only withstand a
maximum pressure of ½ PSI (14”WC).
2)
If the line pressure is beyond this limit, a step-down regulator will be required.
The arrow shown on the bottom of the regulator body shows gas flow direction; it should point downstream to the
appliance. The red air vent cap on the top regulator is part of the regulator and should not be removed.
Any adjustments to regulators must be made only by qualified service personnel with the proper equipment.
NOTE:
Gas pressure should be checked when the unit is installed and all other equipment on the same line is on.
The operating gas pressure must be the same as that specified on the rating plate
The appliance and its individual shutoff valve must be disconnected from the gas supply piping system
during any pressure testing of that system where pressures are in excess of .5 psig (3.45kpa).
When test pressures are .5 psig (3.45kpa) or less, the appliance must be isolated from the gas supply system
by closing its individual manual shutoff valve.
Factory Adjusted System
All Hestan appliances are adjusted and tested before leaving the factory, effectively matching them to sea level
conditions. Adjustments and calibrations to assure proper operation may be necessary on installation to meet local
conditions; low gas characteristics, to correct possible problems caused by rough handling or vibration during
shipment and are to be performed only by qualified service personnel. These adjustments are the responsibility of
the customer and/or dealer and are not covered by our warranty.
Checking for Leaks
CAUTION: When checking for leaks, do not stand with your face close to the combustion chamber.
Check all gas connections for leaks with a soapy water solution before lighting any pilots or attempting operation.
DO NOT USE AN OPEN FLAME TO CHECK FOR LEAKS!
Putting an open flame beside a new gas connection is extremely dangerous.
Prior to lighting, check all joints in the gas supply line for leaks. Use soap
and water solution. Do not use an open flame. After piping has been checked
for leaks, all piping receiving gas should be fully purged to remove air.